diff --git a/openbsc/src/gsm_04_08.c b/openbsc/src/gsm_04_08.c
index 8dece0b..f87406a 100644
--- a/openbsc/src/gsm_04_08.c
+++ b/openbsc/src/gsm_04_08.c
@@ -3113,7 +3113,7 @@
 			"GSM 04.08 discriminator 0x%02x\n", pdisc);
 		break;
 	case GSM48_PDISC_NC_SS:
-		rc = handle_rcv_ussd(msg);
+		rc = handle_rcv_ussd(conn, msg);
 		break;
 	default:
 		LOGP(DRLL, LOGL_NOTICE, "Unknown "